Perhaps I am missing something, but I don't understand the appeal of this phone. Its only real differentiator seems to be the "instant customer service" feature.
I think the glasses-free 3D through gaze tracking is what they expected to be the selling point... I also think that Bezos made a big mistake with this, and that he's such a hard-nosed jerk that he'll do a lot of damage to Amazon trying to force this to succeed before he will admit he was wrong. The phone market is totally saturated, why even bother with it?
I was really disappointed with the 3D when I tried it. Yes, the eye tracking is interesting and works reasonably well, but it's not in any way paradigm-shifting. I definitely didn't feel anything like I was seeing a historically significant innovation.
Most importantly, as far as I can tell, it doesn't make any existing smartphone activities easier or faster, nor does it make possible any new category of activity. Games are neat, but who is going to make games for a platform no one is on?
I agree with the other commenter, however, that Amazon is mostly interested in gathering detailed data on how people use their phones, and even a small percentage of the market is still a lot of useful data. They may learn something interesting (those eye-tracking cameras aren't there just for the sake of the UI), in which case they will be better positioned to increase their market share if they want to.
